TLS ClientHello (JA4)

t13d1912h2_9dc949149365_e5728521abd4

first seen 2026-06-29 09:47 · last seen 2026-09-19 05:52 · JSON

Decomposed attributes

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`19`
Extension count	`12`
ALPN	`h2`
Ciphers	`000a, 002f, 0035, 009c, 009d, 1301, 1302, 1303, c009, c00a, c012, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0012, 0017, 002b, 0032, 0033, ff01`
Signature algorithms	`0804, 0403, 0807, 0805, 0806, 0401, 0501, 0601, 0503, 0603, 0201, 0203`
JA4_r	`t13d1912h2_000a,002f,0035,009c,009d,1301,1302,1303,c009,c00a,c012,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,002b,0032,0033,ff01_0804,0403,0807,0805,0806,0401,0501,0601,0503,0603,0201,0203`
JA4_o (sample)	`t13d1912h2_b565e0f3de94_c9c082b8df90`
JA4_ro (sample)	`t13d1912h2_c02b,c02f,c02c,c030,cca9,cca8,c009,c013,c00a,c014,009c,009d,002f,0035,c012,000a,1301,1302,1303_0000,000b,ff01,0017,0012,0005,000a,000d,0032,0010,002b,0033_0804,0403,0807,0805,0806,0401,0501,0601,0503,0603,0201,0203`

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nn04zhcn_4bdba6e1e609_000000000000_000000000000`	4
`ge20nr020000_5594a17e7e7e_000000000000_000000000000`	3
`ge20nn030000_ff50983941c1_000000000000_000000000000`	2
`ge20nr030000_ff50983941c1_000000000000_000000000000`	2
`ge20nr030000_80b089f68b8e_000000000000_000000000000`	2
`ge20nr020000_e5a56608905c_000000000000_000000000000`	2
`ge20nn04zhcn_6e6dd1d8c348_000000000000_000000000000`	2
`ge20nn030000_80b089f68b8e_000000000000_000000000000`	1
`ge20nr050000_a65a228298b1_000000000000_000000000000`	1
`ge20nr050000_ed3826eaa3a5_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`2:0;4:4194304;5:16384;6:10485760\|1073741824\|0\|a,m,p,s` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.10, go-net/http 1.26.9, +8 more.The fingerprint page shows the full measured match list. More on the catalog.	14
`2:0;4:4194304;6:10485760\|1073741824\|0\|a,m,p,s` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.	6

TCP SYN (p0f)

fingerprint	co-occurrences
`4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	7
`4:49+15:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:0`	5
`4:48+16:0:1460:mss*1,9:mss,sok,ts,nop,ws:df,id+:0`	3
`4:56+8:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:0`	2
`4:43+21:0:1412:mss*1,9:mss,sok,ts,nop,ws:df,id+:0`	2
`4:48+16:0:1412:mss*1,9:mss,sok,ts,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_7`	7
`1460_2-4-8-1-3_1460_9`	3
`1412_2-4-8-1-3_1412_9`	3
`42340_2-4-8-1-3_1460_11`	2

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (compatible; pathscan/1.0)`	7
`Mozilla/5.0 NextScanner/4.0`	7
`Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36`	6

Country

fingerprint	co-occurrences
`RO` · Romania	7
`HK` · Hong Kong SAR China	6
`ID` · Indonesia	5
`NL` · Netherlands	2

Network (ASN)

fingerprint	co-occurrences
`AS204428` · SS-Net	7
`AS150436` · Byteplus Pte. Ltd.	5
`AS135377` · UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED	3
`AS9465` · AGOTOZ PTE. LTD.	3
`AS48090` · TECHOFF SRV LIMITED	2